Window-fastener.



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- AIIORNE Ys' UNITED STATES PATENT OFFICE.

CASSIUS TAIT, OF ST. JOSEPH, MISSOURI.

Specification of Letters Patent.

Patented July 23, 1907.

Application iled May 15,1906. Serial No. 316,990.

To all whom it may concern:

Be it known that I, Cassius TAIT, a citizen o the United States, residing `at St. Joseph, in the county of Buchanan and State oi Missouri, have invented a new and useful Window-Fastener, of which the following is a specification.

This invention relates to sash-fasteners and has for its object to provide a comparatively simple and inexpensive device of this character capable of being readily mounted on a window-sash and by means o which the sash may be securely locked in open or closed position and supported in open position at any desired adjustment.

A iurther object of the invention is to provide a rack designed for attachment to one sash and a casing adapted to be secured to the adjacent sash, said casing being provided with a sliding bolt having a terminal inclined head adapted to engage the correspondingly inclined face of the adjacent tooth on the rack whereby when the bolt is moved to operative position the sashes will be locked in engagement With each other.

A still further object o the invention is to generally improve this class oi devices so as to increase their utility, durability and eiiiciency aswell as to reduce the cost of manufacture.

With these and other objects in view the invention consists in the construction and novel combination and arrangement oi parts hereinafter fully described, and illustrated in the accompanying drawings, it being understood that varions changes in orm, proportions and minor details oi construction may be resorted to within the scope of the appended claims.

In the accompanying drawings forming a part oi this specification: Figure 1 is a perspective view oi a portion of a window showing a sash fastener constructed in accordance with my invention in position thereon. Fig. 2 is a vertical sectional view oi the saine. Fig. 3 is a side elevation o a portion oi the rack. Fig. 4 is a transverse sectional view illustrating a modified forni of the invention. Fig. 5 is a similar view illustrating a still further modication.

Similar numerals of reference indicate corresponding parts in all oi the figures of the drawings. i

The improved fastener is principally designed ier locking sliding-window-sashes in open or closed position and by way o illustration is shown applied to a window oi the ordinary construction in which 5 designates the upper sash and G the lower sash.

Secured to the side rail of the upper sash is a rack 7 the teeth of which project beyond the adjacent longitudinal ace o the side rail and are inclined or beveled at their rear faces as indicated at 8.

Secured to the top rail of the lower sash in any suitable manner as by screws 9 is a casing 10 provided with alined openings 11 for the reception of a revoluble and longitudinally movable bolt 12. The bolt I2 is provided with a terminal head 13 one face oi which is inclined or beveled as indicated at 14 for engagement with the correspondingly beveled iace S oi the teeth on the rack-bar whereby when the bolt is moved to operative position the inclined faces will interengage and thus clamp the sashes together.

Formed in the body oi the casing 10 is a longitudinal slot 15 and communicating with said slot is a cam groove or opening 16 through which extends a shank 17 provided With a terminal Finger-piece 18 by means oi which the bolt may be moved to operative and inoperative position. The casing 10 is preferably formed with laterally extending attaching ears 19 having openings formed therein for the reception oi the screws or similar fastening devices 9.

In operation when it is desired to lock the sashes in open or partially open position said sashes are moved longitudinally oi the window frame until the desired adjustment is effected after which the Finger-piece 1S is moved longitudinally oi the slot 15 until the shank 1.7 enters the cam groove 16 after which the finger-piece 18 is moved laterally within the cam groove 16 thus causing the inclined head of the bolt to engage the inclined face of the adjacent tooth and lock the sash in adjusted position. In order-to release the sash it is merely necessary to move the inger-piece laterally in the opposite direction until the shank 17 enters the slot 15 in which position the head 13 may be readily withdrawn from engagement with the teeth thus permitting the sash to be raised or lowered.

Attention is called to the act that the rear walls oi the sockets 20 are curved to conform to the adjacent Walls ofthe head 12, while th e cam shank 17 by engagement with the Walls of the slot 16 serves to partially rotate the head 12 and thus force the inclined face of the latter in engagement with the inclined iace oi the adjacent tooth on the rack.

In Fig. 4 oi the drawings there is illustrated a modified form oi the invention in which the cani slot 16 is dispensed with, one end of the casing 25 being inclined or beveled to form a cam face 21 adapted to engage the shank 17 oi the operating bolt 11 when the latter is moved to operative position. v

In Fig. 5 oi the drawings the opposite longitudinal edges of the casing 10 are disposed parallel to each other and the bolt 11 slidably mounted within the casing and movable longitudinally into engagement with the teeth on the rack-bar, being subsequently turned laterally to effect the locking of the same, thus dispensing with both the cam slot 1G and the cam face 21.

It will of course be understood that the :fasteners may be made in different sizes and shapes and be attached either to the side rails o the sash or to the center or parting rail.

In some cases the head of the operating bolt and the teeth on the rack may be formed Without the inclined or beveled faces.

From the foregoing description it is thought that the construction and operation of the device may be readily understood by those skilled in the art and further description thereof is deemed unnecessary.

Having thus described the invention What is claimed 1s:

The combination with a pair of movable members, of a rack secured to one of said members and provided with spaced recesses opening through the free edge of the rack and defining a plurality of teeth each having its rear edge inelinedor beveled, a casing secured to the adjacent memlber, and a revoluble andlongitudinally movable bolt mounted in the casing and provided with a terminal head adapted to enter the recesses in the rack, said head having CASSIUS TAIT.

Witnesses:

GEORGE E. JACKSON, ROBERT S. NICHoLs. 

